diff options
Diffstat (limited to 'src/glsl/ir_variable.cpp')
| -rw-r--r-- | src/glsl/ir_variable.cpp | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/src/glsl/ir_variable.cpp b/src/glsl/ir_variable.cpp new file mode 100644 index 00000000000..15a4a92f628 --- /dev/null +++ b/src/glsl/ir_variable.cpp @@ -0,0 +1,345 @@ +/* + * Copyright © 2010 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "ir.h" +#include "glsl_parser_extras.h" +#include "glsl_symbol_table.h" +#include "builtin_variables.h" + +#ifndef Elements +#define Elements(x) (sizeof(x)/sizeof(*(x))) +#endif + +static ir_variable * +add_variable(const char *name, enum ir_variable_mode mode, int slot, + const glsl_type *type, exec_list *instructions, + glsl_symbol_table *symtab) +{ + ir_variable *var = new(symtab) ir_variable(type, name); + + var->mode = mode; + switch (var->mode) { + case ir_var_in: + var->shader_in = true; + var->read_only = true; + break; + case ir_var_inout: + var->shader_in = true; + var->shader_out = true; + break; + case ir_var_out: + var->shader_out = true; + break; + case ir_var_uniform: + var->shader_in = true; + var->read_only = true; + break; + default: + assert(0); + break; + } + + var->location = slot; + + /* Once the variable is created an initialized, add it to the symbol table + * and add the declaration to the IR stream. + */ + instructions->push_tail(var); + + symtab->add_variable(var->name, var); + return var; +} + + +static void +add_builtin_variable(const builtin_variable *proto, exec_list *instructions, + glsl_symbol_table *symtab) +{ + /* Create a new variable declaration from the description supplied by + * the caller. + */ + const glsl_type *const type = symtab->get_type(proto->type); + + assert(type != NULL); + + add_variable(proto->name, proto->mode, proto->slot, type, instructions, + symtab); +} + + +static void +generate_110_uniforms(exec_list *instructions, + glsl_symbol_table *symtab) +{ + for (unsigned i = 0 + ; i < Elements(builtin_110_deprecated_uniforms) + ; i++) { + add_builtin_variable(& builtin_110_deprecated_uniforms[i], + instructions, symtab); + } + + /* FINISHME: The size of this array is implementation dependent based on the + * FINISHME: value of GL_MAX_TEXTURE_COORDS. Every platform that supports + * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4 + * FINISHME: for now. + */ + const glsl_type *const mat4_array_type = + glsl_type::get_array_instance(symtab, glsl_type::mat4_type, 4); + + add_variable("gl_TextureMatrix", ir_var_uniform, -1, mat4_array_type, + instructions, symtab); + + /* FINISHME: Add support for gl_DepthRangeParameters */ + /* FINISHME: Add support for gl_ClipPlane[] */ + /* FINISHME: Add support for gl_PointParameters */ + + /* FINISHME: Add support for gl_MaterialParameters + * FINISHME: (glFrontMaterial, glBackMaterial) + */ + + /* FINISHME: The size of this array is implementation dependent based on the + * FINISHME: value of GL_MAX_TEXTURE_LIGHTS. GL_MAX_TEXTURE_LIGHTS must be + * FINISHME: at least 8, so hard-code 8 for now. + */ + const glsl_type *const light_source_array_type = + glsl_type::get_array_instance(symtab, + symtab->get_type("gl_LightSourceParameters"), 8); + + add_variable("gl_LightSource", ir_var_uniform, -1, light_source_array_type, + instructions, symtab); + + /* FINISHME: Add support for gl_LightModel */ + /* FINISHME: Add support for gl_FrontLightProduct[], gl_BackLightProduct[] */ + /* FINISHME: Add support for gl_TextureEnvColor[] */ + /* FINISHME: Add support for gl_ObjectPlane*[], gl_EyePlane*[] */ + /* FINISHME: Add support for gl_Fog */ +} + +static void +generate_110_vs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) { + add_builtin_variable(& builtin_core_vs_variables[i], + instructions, symtab); + } + + for (unsigned i = 0 + ; i < Elements(builtin_110_deprecated_vs_variables) + ; i++) { + add_builtin_variable(& builtin_110_deprecated_vs_variables[i], + instructions, symtab); + } + generate_110_uniforms(instructions, symtab); + + /* FINISHME: The size of this array is implementation dependent based on the + * FINISHME: value of GL_MAX_TEXTURE_COORDS. Every platform that supports + * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4 + * FINISHME: for now. + */ + const glsl_type *const vec4_array_type = + glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4); + + add_variable("gl_TexCoord", ir_var_out, VERT_RESULT_TEX0, vec4_array_type, + instructions, symtab); +} + + +static void +generate_120_vs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + /* GLSL version 1.20 did not add any built-in variables in the vertex + * shader. + */ + generate_110_vs_variables(instructions, symtab); +} + + +static void +generate_130_vs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + void *ctx = symtab; + generate_120_vs_variables(instructions, symtab); + + for (unsigned i = 0; i < Elements(builtin_130_vs_variables); i++) { + add_builtin_variable(& builtin_130_vs_variables[i], + instructions, symtab); + } + + /* FINISHME: The size of this array is implementation dependent based on + * FINISHME: the value of GL_MAX_CLIP_DISTANCES. + */ + const glsl_type *const clip_distance_array_type = + glsl_type::get_array_instance(ctx, glsl_type::float_type, 8); + + /* FINISHME: gl_ClipDistance needs a real location assigned. */ + add_variable("gl_ClipDistance", ir_var_out, -1, clip_distance_array_type, + instructions, symtab); + +} + + +static void +initialize_vs_variables(exec_list *instructions, + struct _mesa_glsl_parse_state *state) +{ + + switch (state->language_version) { + case 110: + generate_110_vs_variables(instructions, state->symbols); + break; + case 120: + generate_120_vs_variables(instructions, state->symbols); + break; + case 130: + generate_130_vs_variables(instructions, state->symbols); + break; + } +} + +static void +generate_110_fs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) { + add_builtin_variable(& builtin_core_fs_variables[i], + instructions, symtab); + } + + for (unsigned i = 0 + ; i < Elements(builtin_110_deprecated_fs_variables) + ; i++) { + add_builtin_variable(& builtin_110_deprecated_fs_variables[i], + instructions, symtab); + } + generate_110_uniforms(instructions, symtab); + + /* FINISHME: The size of this array is implementation dependent based on the + * FINISHME: value of GL_MAX_TEXTURE_COORDS. Every platform that supports + * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4 + * FINISHME: for now. + */ + const glsl_type *const vec4_array_type = + glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4); + + add_variable("gl_TexCoord", ir_var_in, FRAG_ATTRIB_TEX0, vec4_array_type, + instructions, symtab); +} + + +static void +generate_ARB_draw_buffers_fs_variables(exec_list *instructions, + glsl_symbol_table *symtab, bool warn) +{ + /* FINISHME: The size of this array is implementation dependent based on the + * FINISHME: value of GL_MAX_DRAW_BUFFERS. GL_MAX_DRAW_BUFFERS must be + * FINISHME: at least 1, so hard-code 1 for now. + */ + const glsl_type *const vec4_array_type = + glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 1); + + ir_variable *const fd = + add_variable("gl_FragData", ir_var_out, FRAG_RESULT_DATA0, + vec4_array_type, instructions, symtab); + + if (warn) + fd->warn_extension = "GL_ARB_draw_buffers"; +} + + +static void +generate_120_fs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + generate_110_fs_variables(instructions, symtab); + generate_ARB_draw_buffers_fs_variables(instructions, symtab, false); +} + +static void +generate_130_fs_variables(exec_list *instructions, + glsl_symbol_table *symtab) +{ + void *ctx = symtab; + generate_120_fs_variables(instructions, symtab); + + /* FINISHME: The size of this array is implementation dependent based on + * FINISHME: the value of GL_MAX_CLIP_DISTANCES. + */ + const glsl_type *const clip_distance_array_type = + glsl_type::get_array_instance(ctx, glsl_type::float_type, 8); + + /* FINISHME: gl_ClipDistance needs a real location assigned. */ + add_variable("gl_ClipDistance", ir_var_in, -1, clip_distance_array_type, + instructions, symtab); +} + +static void +initialize_fs_variables(exec_list *instructions, + struct _mesa_glsl_parse_state *state) +{ + + switch (state->language_version) { + case 110: + generate_110_fs_variables(instructions, state->symbols); + break; + case 120: + generate_120_fs_variables(instructions, state->symbols); + break; + case 130: + generate_130_fs_variables(instructions, state->symbols); + break; + } + + + /* Since GL_ARB_draw_buffers is included in GLSL 1.20 and later, we + * can basically ignore any extension settings for it. + */ + if (state->language_version < 120) { + if (state->ARB_draw_buffers_enable) { + generate_ARB_draw_buffers_fs_variables(instructions, state->symbols, + state->ARB_draw_buffers_warn); + } + } +} + +void +_mesa_glsl_initialize_variables(exec_list *instructions, + struct _mesa_glsl_parse_state *state) +{ + switch (state->target) { + case vertex_shader: + initialize_vs_variables(instructions, state); + break; + case geometry_shader: + break; + case fragment_shader: + initialize_fs_variables(instructions, state); + break; + case ir_shader: + fprintf(stderr, "ir reader has no builtin variables"); + exit(1); + break; + } +} |